void setup() {
  Serial.begin(9600);// setup Serial Monitor to display information
  pinMode(SENSOR, INPUT_PULLUP);// define pin as Input  sensor
  pinMode(ACTION, OUTPUT);// define pin as OUTPUT for ACTION
  pinMode(segmentClock, OUTPUT);
  pinMode(segmentData, OUTPUT);
  pinMode(segmentLatch, OUTPUT);
  pinMode(segmentClockLAP, OUTPUT);
  pinMode(segmentDataLAP, OUTPUT);
  pinMode(segmentLatchLAP, OUTPUT);

  
  pinMode(13,OUTPUT); // blink tester
  digitalWrite(segmentClock, LOW);
  digitalWrite(segmentData, LOW);
  digitalWrite(segmentLatch, LOW);
  digitalWrite(segmentClockLAP, LOW);
  digitalWrite(segmentDataLAP, LOW);
  digitalWrite(segmentLatchLAP, LOW);

  pinMode(button, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(button), pushButton, RISING);
  attachInterrupt(digitalPinToInterrupt(SENSOR), irSensor, FALLING);

  Serial.println("Iowa Lap Timer");
  Serial.print(distance, 4);
  Serial.println (" = circumference in miles");
  Serial.print(.250/distance, 4);
  Serial.println(" = laps per quarter mile");
  Serial.print(.310686/distance, 4);
  Serial.println(" =laps per 500 meters");
  Serial.println ("READY!");
  showShape(0);
  showShapeLAP(0);
  delay(500);
  showShape(4);
  showShapeLAP(4);
  delay(500);
  showShape(0);
  showShapeLAP(0);
  delay(500);
  showShape(2);
  showShapeLAP(2);
}